Associations of sedentary time and breaks in sedentary time with disability in instrumental activities of daily living in community-dwelling older adults

Tao Chen, Kenji Narazaki, Yuka Haeuchi, Sanmei Chen, Takanori Honda, Shuzo Kumagai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Background: This cross-sectional study was performed to examine associations of objectively measured sedentary time (ST) and breaks in sedentary time (BST) with instrumental activities of daily living (IADL) disability in Japanese community-dwelling older adults. Methods: The sample comprised 1634 older adults (mean age: 73.3 y, men: 38.4%). Sedentary behavior was measured using a triaxial accelerometer. Disability was defined as inability in at least 1 of the IADL tasks using the Tokyo Metropolitan Institute of Gerontology Index of Competence. Results: After adjusting for potential confounders and moderate-to-vigorous physical activity (MVPA), longer ST was significantly associated with higher likelihood of IADL disability, whereas a greater number of BST was associated with lower likelihood of IADL disability. ST and BST remained statistically significant after mutual adjustment with odds ratio of 1.30 (95% confidence interval [CI)], 1.00-1.70) and 0.80 (95% CI, 0.65-0.99), respectively. Conclusions: This study first demonstrated that shorter ST and more BST were associated with lower risk of IADL disability independent of MVPA and that the association for ST was independent of BST and vice versa. These findings suggest not only total ST but also the manner in which it is accumulated may contribute to the maintenance of functional independence in older adults.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalJournal of Physical Activity and Health
Volume13
Issue number3
DOIs
Publication statusPublished - Mar 2016

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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